Volcano Term Definitions
The opening at the earth's surface through which volcanic materials issue forth.
A small air pocket or cavity formed in volcanic rock during solidification
A measure of resistance to flow in a liquid (water has low viscosity while honey has a higher viscosity.)
A persistent volcanic vent area that has built a complex combination of volcanic landforms.
A type of eruption consisting of the explosive ejection of incandescent fragments of new viscous lava, usually on the form of blocks.
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